Photo: Mini "Sabrina, the Teenage Witch" Reunion!

Those Spellmans stick together!

Melissa Joan Hart held a launch party for her new book, "Melissa Explains It All: Tales From My Abnormally Normal Life," on Tuesday -- where her former "Sabrina, the Teenage Witch" costar Caroline Rhea showed up to give her support.

The two posed together on the red carpet at Monkey Bar in NYC.

Making the sighting even better: MJH's TV aunt was wearing a top with a black cat on it! Is that Salem?

We gotta say, Hart was looking great at the event -- and was giving us shades of Britney Spears with that hair.

Can you believe it's been 10 years since the ABC show went off the air?

Check out the gallery above to see what the rest of Melissa and Caroline's costars all look like now -- plus, see the rest of the TGIF lineup!